what is the density of this city, if the population is 2,134,411 & the area is 10,400km^2

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?